Performance analysis of vertically coupled triple micro optical ring resonator as optical filters with multiple output bus waveguides

A triple micro optical ring resonator (TMORR) of silicon nitride with multiple output bus waveguides is modeled based on vernier principle. This proposed model is analyzed using delay line signal processing approach and Mason's gain formula in Z-domain. Performance analysis of this ring model is obtained in MATLAB. A higher value of free spectral range (FSR) is obtained from both the output buses with negligible crosstalk. Thus it can be efficiently utilized in communication system also can be used for obtaining optical filter. Group delay, dispersion characteristics and finesse are also graphically presented in this work.